Our camp's going to make a few bucket coolers. I cut the pad dimensions as indicated below-
Cut the first pad 33 1/2x13 inches.
Roll this pad into a tube and silicone or hand stitch the seam.
This will give you a tube 13 inches tall.
Cut a second piece of pad 24x13 inches and roll into a tight tube.
33.5" makes too wide a tube for the bucket. I'm using the 5 gallon buckets from Tru-Value (the same as Home Depot's).
Also should the inner pad be a smidge taller? Or do you just pull it up a bit to make contact with the lid when closed?